Queen Elizabeth, the longest reigning monarch of Britain, became queen on Feb. 6, 1952, after her father King Georgie VI died in his sleep of a coronary thrombosis at age 56. Take a look back at her incredible reign 66 years after she took the throne.

The life and reign of Queen Elizabeth II

Queen Elizabeth II and Prince Philip's 70th wedding anniversary

The Queen and the Duke of Edinburgh got married in 1947 and are still married 70 years on. The Queen and His Royal Highness are framed by Thomas Gainsborough's 1781 portraits of George III and Queen Charlotte, who were married for 57 years.